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Ok the 32 and 42 series are rainbirds homeownrs rotors. The product youll get at SW are contractor grade.

For the back yard 21 rotors may be overkill but it depends on the shape. If it is a basic rectangel then we could lay out your system and do it with 14 rotors RB 5000 or Hunter PGP's. If you give us more info we will help you with this.

what is your pressure, gpm's, well or city water, service line size. shape of your property?

I sent my measurments of my property to rainbird and they sugested the 42sa and 32sa rotors. I have a ten thousand square foot lot. My back yard is 120 feet by 50 feet and they recomend 21 32sa rotors and I have a garadge 20 feet by 40 feet in the back yard. They sugested 4 rainbird 42sa rotors for the front yard. Its a small grass area. Does 21 rotors sound about right or is it over kill for the back yard?

Rainbird rotors

I have purchased 21 32sa rotors and 4 42sa rotors and I have been hearing a lot of negative feedback about the rotors. Should I return them or will they they do the job? I also wanted to know if I should use 3/4 or 1 inch copper supply from the meter to the backflow. I will be using 1 inch poly.